Aseries of supreme court cases have extended virtually all of the important constitutional protections to all levels of national, state, and local government, via a process called

Incorporation

Explanation:

 The incorporation is the term that is used to refers all the legal process and it is one of the corporate entity that helps in recognizing the laws.

It is also known as the non-profitable organization or firm such as government of united states.

According to the given question, the series of the cases of supreme court are virtually protecting the constitution by all the levels of government such as local, national and the state.  

 Therefore, Incorporation is the correct answer.

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